<template>
    <div>
      <template v-for="(tag, index) in tags">
        <a-tooltip v-if="tag.length > 20" :key="tag" :title="tag">
          <a-tag :key="tag" :closable="index !== 0" @close="() => handleClose(tag)">
            {{ `${tag.slice(0, 20)}...` }}
          </a-tag>
        </a-tooltip>
        <a-tag v-else :key="tag" :closable="index !== 0" @close="() => handleClose(tag)">
          {{ tag }}
        </a-tag>
      </template>
      <a-input
        v-if="inputVisible"
        ref="input"
        type="text"
        size="small"
        :style="{ width: '78px' }"
        :value="inputValue"
        @change="handleInputChange"
        @blur="handleInputConfirm"
        @keyup.enter="handleInputConfirm"
      />
      <a-tag v-else style="background: #fff;" borderStyle="dashed" @click="showInput">
        <a-icon type="plus" />新标签
      </a-tag>
    </div>
  </template>
  <script>
  export default {
    data() {
      return {
        tags: ['不可删除', '标签 2', '标签 3'],
        inputVisible: false,
        inputValue: '',
      };
    },
    methods: {
      handleClose(removedTag) {
        const tags = this.tags.filter(tag => tag !== removedTag);
        console.log(tags);
        this.tags = tags;
      },
  
      showInput() {
        this.inputVisible = true;
        this.$nextTick(function() {
          this.$refs.input.focus();
        });
      },
  
      handleInputChange(e) {
        this.inputValue = e.target.value;
      },
  
      handleInputConfirm() {
        const inputValue = this.inputValue;
        let tags = this.tags;
        if (inputValue && tags.indexOf(inputValue) === -1) {
          tags = [...tags, inputValue];
        }
        console.log(tags);
        Object.assign(this, {
          tags,
          inputVisible: false,
          inputValue: '',
        });
      },
    },
  };
  </script>
  